//
//  UserAccount.swift
//  SinaWeibo
//
//  Created by Tony-ztb on 15/12/16.
//  Copyright © 2015年 Tony-ztb. All rights reserved.
//

import UIKit

class UserAccount: NSObject, NSCoding {

    // 用于调用access_token，接口获取授权后的access token
    var access_token: String?
    // access_token的生命周期，单位是秒数
    var expires_in: NSTimeInterval = 0 {
        didSet{
            // 当过期时间一旦被设置的时候  就立即设置expires_date
            expires_date = NSDate(timeIntervalSinceNow: expires_in)
        }
    }
    // token的过期日期
    // token的过期日期  开发者账号的token的有效期 是 5年  普通用户的账号有效期 是 3天
    var expires_date: NSDate?
    // 当前授权用户的UID
    var uid: String?
    // 友好显示名称
    var name: String?
    // 用户头像地址（大图），180×180像素
    var avatar_large: String?
    
    
    init(dict: [String : AnyObject]) {
        super.init()
        setValuesForKeysWithDictionary(dict)
    }
    
    override func setValue(value: AnyObject?, forUndefinedKey key: String) {}
    
    // 打印对象,便于查看
    override var description: String {
        let keys = ["access_token", "expires_in", "uid", "name", "avatar_large", "expires_date"]
        return dictionaryWithValuesForKeys(keys).description
    }
    
    // 保存自定义对象
    func saveAccount() {
        // 存储在沙盒中
        let path = (NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).last! as NSString).stringByAppendingPathComponent("account.plist")
        print(path)
        // 保存自定义对象
        NSKeyedArchiver.archiveRootObject(self, toFile: path)
    }
    
    // 获取自定义对象
    // 返回值不能为必选项
    class func loadAccount() -> UserAccount? {
        // 从磁盘中解档数据
        let path = (NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true).last! as NSString).stringByAppendingPathComponent("account.plist")
        
        if let account = NSKeyedUnarchiver.unarchiveObjectWithFile(path) as? UserAccount {
            // OrderedDescending 降序   说明没有过期,所以返回用户的信息数据
            if account.expires_date?.compare(NSDate()) == NSComparisonResult.OrderedDescending{
                return account
            }
        }
    return nil
    }
    
    
    
    // 解档操作
    required init?(coder aDecoder: NSCoder) {
        access_token = aDecoder.decodeObjectForKey("access_token") as? String
        expires_in = aDecoder.decodeDoubleForKey("expires_in")
        uid = aDecoder.decodeObjectForKey("uid") as? String
        name = aDecoder.decodeObjectForKey("name") as? String
        avatar_large = aDecoder.decodeObjectForKey("avatar_large") as? String
        expires_date = aDecoder.decodeObjectForKey("expires_date") as? NSDate
    }
    
    // 归档操作
    func encodeWithCoder(aCoder: NSCoder) {
        aCoder.encodeObject(access_token, forKey: "access_token")
        aCoder.encodeDouble(expires_in, forKey: "expires_in")
        aCoder.encodeObject(uid, forKey: "uid")
        aCoder.encodeObject(name, forKey: "name")
        aCoder.encodeObject(avatar_large, forKey: "avatar_large")
        aCoder.encodeObject(expires_date, forKey: "expires_date")
    }
    
}
